[MichelleC]

I'm growing Jack O'Lantern pumkins and have planted them out as they were getting too big for the greenhouse. I place them of top of lots of well rotten manure mixed with soil in a small mound. The leaves are starting to turn yellow but did so whilst in the greenhouse. I've looked on various websites but there seems to be no one answer. Not enough water, too much, low in nitrogen, possible disease. There are no obvious markings or pests. Can anyone please advise? My sweetcorn is also quite yellow and the lower leaves of my 1ft peas seem to have dried and died off. x

[JayG]

There often is no single answer to why plants start looking a bit sickly, but given your location and the recent weather I'd guess the pumpkins and sweetcorn are both suffering from the breezes and still quite low night temperatures (the latter could still apply inside the greenhouse over the last 2 weeks.)

If you can give them any sort of protection that would probably help; sweetcorn often go into a "pale sulk" if it's too cold for them; you'll just have to hope for warmer weather and that they cheer up. 

[DD.]

I agree with JayG re the low temperatures. It is a bit early for both to be out. Mine won't see the outdoors until June.

Re the peas - lack of water? It has been very dry of late.

[MichelleC]

Thanks for the replies. We've had some glorious weather up here but probably cold nights. I hope it is just that. Maybe I should sow the seeds a little later next year.  Will it hurt to add a little nitrogen?

[bigben]

When it comes to pumkins you cannot really overfeed them. Peas would also respond to a little nitrogen to get them started even though they can "fix" their own.

[Missy1970]

I'm only sowing my pumkin today!

[Alastair-I]

Thanks for the replies. We've had some glorious weather up here but probably cold nights. I hope it is just that. Maybe I should sow the seeds a little later next year.  Will it hurt to add a little nitrogen?

As above, not too late to sow another batch this week (or next).  So no need to wait until next year.  My second batch will be sown into pots (ok, toilet roll tubes) this week in case the first batch (sown too early and now out-growing 9" pots) don't take kindly to being transferred out to the plot.